Release Details

-- Interoperability with Microsoft Virtual Server 2005 R2 technology simplifies data center consolidation, supports enterprise and remote office data protection capabilities --

Oceanport, N.J. — June 20, 2006 — CommVault®, a provider of Unified Data Management™ solutions, today announced integration of the CommVault QiNetix™ 6.1 Unified Data Management software suite with Microsoft Virtual Server 2005 R2.CommVault's interoperability with this Microsoft server virtualization technology offers users increased operational efficiency in server consolidation, application re-hosting, disaster recovery and software test and development environments.

Building upon CommVault's strong support of the .NET platform and existing applications, the integration of CommVault QiNetix 6.1 software with Virtual Server 2005 R2 offers Microsoft users ease of administration while reducing the costs associated with managing and protecting data. Users are able to:

• Consolidate multiple workloads from disparate sources — including data from remote offices — onto a physical server, making more efficient use of hardware resources.
• Simplify management of hardware resources.
• Automate deployment and configuration of connected virtual machines, administering those virtual machines with CommVault QiNetix management tools.
• Use Volume Shadow Copy Services to help protect individual virtual machines as well as Microsoft Virtual Server 2005 R2.

Microsoft Virtual Server 2005 R2 is used by corporate datacenters as a cost-effective server virtualization technology. As part of a server consolidation strategy, Virtual Server 2005 R2 increases hardware utilization and enables organizations to rapidly configure and deploy new servers.

Integration of QiNetix 6.1 with Virtual Server 2005 R2 extends QiNetix's data management and protection capabilities. The QiNetix product suite unifies backup and recovery, point-in-time replication, Hierarchical Storage Management (HSM), archiving for compliance, Storage Resource Management (SRM) and service level management. From a single console, the suite's components share automated policy management and common job and event managers on the front end, and distributed metadata indices, media management and copy management on the back end. The QiNetix suite, built upon CommVault's Common Technology Engine, integrates Galaxy backup and recovery, snapshot management and recovery, active data migration and archiving, email compliance, enterprise service level management and reporting and storage resource management software solutions.

"Microsoft is pleased that the integration of CommVault QiNetix with Microsoft Virtual Server 2005 enables users to take advantage of the storage, application management and integration capabilities of QiNetix with Virtual Server 2005," said Jim Ni, group product manager of the Windows Server Division at Microsoft Corp. "CommVault's support for Virtual Server 2005 includes the enhanced protection of Virtual Server 2005 and the virtual machines it is managing. CommVault can now use Volume Shadow Copy Services as a way to help protect not only individual virtual machines, but also Virtual Server 2005 from the top down."

"Our support for Microsoft Virtual Server 2005 is another example of how CommVault continues to offer increased customer value for users of Microsoft technology," said Randy De Meno, chief evangelist, CommVault. "We've recently seen a dramatic increase in deployments of Virtual Server 2005, and we are excited to deliver support for Virtual Server 2005 to our customers."

About CommVault
CommVault® provides Unified Data Management™ solutions to ensure high- performance data protection, universal availability and simplified management of complex storage networks. The CommVault® QiNetix™ platform, based on CommVault's Common Technology Engine, integrates Galaxy backup and recovery, point-in-time replication, hierarchical storage management, archiving for compliance, service level management and storage resource management software solutions. The QiNetix unified approach is designed to allow customers to add/integrate QiNetix components, at a fraction of the time, effort and money required by separate point products.

Information about CommVault is available on the World Wide Web at www.commvault.com or by calling (732) 870-4000. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

©2006 CommVault Systems, Inc. CommVault Systems, CommVault Galaxy, CommVault QiNetix, DataMigrator, DataArchiver, QNet, CommServe StorageManager, MediaAgent, iDataAgent, CommCell and the CommVault logo are trademarks and may be registered trademarks in some jurisdictions of CommVault Systems, Inc. Product and company names herein may be trademarks of their respective owners.

This press release may contain forward-looking statements, including statements regarding financial projections, which are subject to risks and uncertainties, such as competitive factors, difficulties and delays inherent in the development, manufacturing, marketing and sale of software products and related services, general economic conditions and others. Statements regarding CommVault's beliefs, plans, expectations or intentions regarding the future are forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. All such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from anticipated results. CommVault does not undertake to update its forward-looking statements.